Loader agitator for concrete-mixing machines



G. JAEGER May 28, 1929.

LOADER AGITATOR FOR CONCRETE MIXING MACHINES Filed Jan. 8, 1927 GEBHARDJAEGER 1 Q?" I A"; avian W 1 tion on Patented May 28, 1929 nairsn tarts GEBI-EARD Janene, crooner/inns, OHIO, Assrenoa T rnnmnennmnoninn 00M PANY, 9F COLUMBUS, 01-110, A CORPORATIDN OF OHIO.

LOADER 'AGITATQR FOR CONCRETE MIXING MACHINES.

Application f ledianuary s, 1927. Serial No; 159x275.v

In the type-of concrete mixer in which the mixing drum is charged by means of a charging bucket that is raised on a pivot to discharge its contents of sand, gravel and cement into the drum thefiow of such contents from the bucket is often so tardy as to necessitate pounding the bottom :of the bucket "ith a hammer, heavy bar or other convenient instrument adapted to shake and hasten the material along. Such pounding indents and disfigures the bucket and aggravates the trouble. Means have heretofore been proposed and patented to automatically bodily agitate the bucket without such pounding hence the object of the present invcntion is a simplified and improved means for accomplishinga similar result.

The invention is embodied in the example herein shown and described, the features of novelty being finally claimed.

In the accompanying drawing- 7 Figure 1 is a view in elevation showing my invention applied to a concrete mixing machine in which the mixing drum is of the rotating but non-tilting type, the view being taken at thatside of the machine containing the charging bucket. v

Fig. 2 is a combined section and elevathe line II-TI Fig. 1 looking inthe direction indicated by the arrows adjacent said line.

Fig. 3 is a detail in section illustrating a portion of the drum rotating means.

In the views the character 5 designates the mixing drum, it being rotated by means of a power or crank shaft 6 operating a pinion 7 meshed with an annular rack 8 on the drum. At one end the drum has a charging opening as seen at 9.

The character 10 designates the charging bucket, it having side straps 11, 11 hinged at their forward ends to the lower cross bar 12 of a linking frame comprising also side bars 13, 13, and upper cross bar 14, the lat ter being pivoted in upright frame members 15, 15, erected on the bed 16 of a suitable truck. The bucket can be raised to positlon to discharge its contents into the drum through the aforesaid opening 9 by means of a pair of cables 18 winding on spools fast on a suitable shaft 19 driven by the power shaft 16 through a'sprocket chain 20,.suitable clutching devices and means for operating them provided to control the times when the bucketshall be raised and lowered. Such last described mechanism, ina general way, I

isnow in extensive use and requires no detailed description here.

The drum is rotated able engine housed in the hood 21, the power shaft 6 of such engine having a pinion 22 driving a larger gear 23' having shaft 25 in a housing 24, the pinion 7 on said shaft 25 enby means of a suitgaging the annular rack 8 as before stated On said shaft .25 is a sprocket pinion 26 'e'X- tending from which to a large sprocket 27 is ii'lge sprocket chain to operate the shaft The shaft hassecured to it a double cam 28. Journaled in the lower portions of the upright frame members 15, 15, is a rock shaft 29 securedto which are two shaker arms 30 arranged in planes includingthe projecting inncrportions of side straps 11, 11, so that when the bucket is raised on the crossbar 12 said. side straps are brought into contact with said shaker arms 30. One end of the rock shaft29 has secured to it one end of a crank arm 31, the other or free'jend of said arm being provided with an antifriction roller 81 adapted to contact with the double cam 28 on shaft 25, when the arm is depressed. The arm 31 has connected to it a coil spring 32 attached to a fixedbar 33,

said spring adapted to hold the arm 31 removed from operation by the double cam 28, and the shaker arms 30 advanced, when the bucket is down, but in position to be operated to cause contact of the roller 51 when the bucket approaches and is in its discharging position. v r

The operation is this: The engine shaftG and mixing drum are driven in one direction with a constant motion, the bucket hoisting and lowering mechanism 1y controlled at will as usual. The bucket is supplied with the usual solid ingredients and being manual- 9 the drum with water from a tank having a- I spout as shown at 34-. When the bucket is raised to position to discharge its contents into the drum the shaker arms 30 are pushed inward thereby depressing the anti-friction rollersof the crank arm into position to be actuated by the double cam which being in rapid rotation vibrates the bucket onthe upper cross bar 14. Such agitation of the bucket causes the appropriate and substantially complete discharge of the contents of the bucket into the mixing drum throughthe openingi) of the drum. After such a dis:

charge the bucket is lowered and supplied withthe necessary fresh charge of solids, it being noted that in the intervals between the elevated positions of the bucket the double cam turns without actuating the bucket agitating elements.

The forms of the parts can be changed without departing from the gist of the invention as claimed.

What I claim is:

1. In a concrete mixing machine having a rotatable mixing drum, a charging bucket therefor, and linking means for the bucket, means for agitating the bucket on its linking means including a crank arin and means for oscillating the same, and means whereby said crank arm is held out of oscillating po sition until the charging bucket it in drum charging position.

2, In a concrete mixing machine having a mixing drum, means for rotating the drum, a charging bucket forthe drum, and linking means for the bucket, means for agitating the bucket on its linking means including a crank arm, means operated by the drum rotating means for oscillating said crank arm, and means whereby said crank arm is held out of oscillating position until.

the charging bucket is in drum charging position.

v 3. In a concrete mixing machine having a mixing drum, means for rotating the drum, a charging bucket for the drum and linking means for the bucket,'1neans for agitating the bucket on its linking means including a crank arm, and a double cam 0perated by the drum rotating means for os= cillating-sai'd crank arm, and means Whereby said crankarm is held out of oscillating position until the charging bucket is in drum charging position.

7 4C. "In a concrete mixing machine having a mixing clru1n,means for rotating the drum, a charging bucketfor the drum, and linking means for the bucket, means for agitating the bucket on its linking means including a cam operated by the drum and acting on the linking means, and means whereby said linking means are held out of actuated position pending the arrival of :the bucket at drum charging position. 7

5. In a concrete mixing machine having a rotatable mixing drum, means for rotating the drum, a charging bucket therefor, means for holding the bucket in linked relation to the mixing drum, means for agitating the drum when in charging position consisting of a rock shaft having an arm actuated by the bucket, a cam operated by the drum r07 tating means, and means whereby said arm is held from operating said. cam until the drum arrives at drum charging position.

6. In a concrete mixing machine having a rotatable mixing drum, means for rotating the drum, a charging bucket therefor, means for holding the bucket in linked re lation to the mixin drum, means tating the drum when in, charging position consisting of a rock shaft having an arm actuated by the bucket, a cam operated by the drum rotating means, and means whereby said arm is held from operating said cam until the drum arrives at drum charging position, and means for removing said arm from said cam when the bucket retreats from drum charging position.

EBHARD JAEGEll for agi- 

